Source
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* print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
// SPDX-License-Identifier: GPL-2.0-only
/*
* lib/hexdump.c
*/
const char hex_asc[] = "0123456789abcdef";
EXPORT_SYMBOL(hex_asc);
const char hex_asc_upper[] = "0123456789ABCDEF";
EXPORT_SYMBOL(hex_asc_upper);
/**
* hex_to_bin - convert a hex digit to its real value
* @ch: ascii character represents hex digit
*
* hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
* input.
*/
int hex_to_bin(char ch)
{
if ((ch >= '0') && (ch <= '9'))
return ch - '0';
ch = tolower(ch);
if ((ch >= 'a') && (ch <= 'f'))
return ch - 'a' + 10;
return -1;
}
EXPORT_SYMBOL(hex_to_bin);
/**
* hex2bin - convert an ascii hexadecimal string to its binary representation
* @dst: binary result
* @src: ascii hexadecimal string
* @count: result length
*
* Return 0 on success, -EINVAL in case of bad input.
*/
int hex2bin(u8 *dst, const char *src, size_t count)
{
while (count--) {
int hi = hex_to_bin(*src++);
int lo = hex_to_bin(*src++);
if ((hi < 0) || (lo < 0))
return -EINVAL;
*dst++ = (hi << 4) | lo;
}
return 0;
}
EXPORT_SYMBOL(hex2bin);
/**
* bin2hex - convert binary data to an ascii hexadecimal string
* @dst: ascii hexadecimal result
* @src: binary data
* @count: binary data length
*/
char *bin2hex(char *dst, const void *src, size_t count)
{
const unsigned char *_src = src;
while (count--)
dst = hex_byte_pack(dst, *_src++);
return dst;
}
EXPORT_SYMBOL(bin2hex);
/**
* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
* @buf: data blob to dump
* @len: number of bytes in the @buf
* @rowsize: number of bytes to print per line; must be 16 or 32
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
* @linebuf: where to put the converted data
* @linebuflen: total size of @linebuf, including space for terminating NUL
* @ascii: include ASCII after the hex output
*
* hex_dump_to_buffer() works on one "line" of output at a time, i.e.,
* 16 or 32 bytes of input data converted to hex + ASCII output.
*
* Given a buffer of u8 data, hex_dump_to_buffer() converts the input data
* to a hex + ASCII dump at the supplied memory location.
* The converted output is always NUL-terminated.
*
* E.g.: